<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>. 
//
// This file was modified by contributors of "BOINC Web Tweak" project.

require_once("../inc/bolt_db.inc");
require_once("../inc/util_ops.inc");

function show_course($course) {
	$x = "<b>$course->name</b>
			<br>Description: $course->description
			<br>Created: ".date_str($course->create_time)."
	";
	$y = "<a href=bolt_map.php?course_id=$course->id>Map</a>
		<br><a href=bolt_compare.php?course_id=$course->id>Experiments</a>
		<br>
	";
	row2_init($x, $y);
	if ($course->hidden) {
		show_button("bolt_admin.php?action=unhide&course_id=$course->id", "Unhide", "Unhide this course");
	} else {
		show_button("bolt_admin.php?action=hide&course_id=$course->id", "Hide", "Hide this course");
	}
	show_button("bolt_admin.php?action=clear_confirm&course_id=$course->id", "Clear data", "Clear student data for this course");
	echo "</td></tr>";
}

function show_courses() {
	$courses = BoltCourse::enum();
	start_table();
	table_header("Course", "Tools");
	foreach ($courses as $course) {
		show_course($course);
	}
	end_table();
}

function add_course_form() {
	echo "
		<form action=bolt_admin.php method=get>
		<input type=hidden name=action value=add_course>
	";
	start_table();
	row1("Add course");
	row2("Course name<span class=note><br>Visible to users</span>", "<input name=course_name>");
	row2("Internal name<span class=note><br>Not visible to users; used as a directory name, so no spaces or special chars</span>", "<input name=short_name>");
	row2("Description<span class=note><br>Visible to users</span>", "<textarea name=description cols=60></textarea>");
	row2("", "<input type=submit name=submit value=\"Add course\">");
	end_table();
	echo "</form>";
}

function user_settings() {
	global $user;
	$flags = $user->bolt->flags;
	echo "<form action=bolt_admin.php method=get>
		<input type=hidden name=action value=update_user>
	";
	start_table();
	row1("User settings");
	$x = ($flags&BOLT_FLAGS_SHOW_ALL)?"checked":"";
	row2("Show hidden courses?", "<input type=checkbox name=show_all $x>");
	$x = ($flags&BOLT_FLAGS_DEBUG)?"checked":"";
	row2("Show debugging output?", "<input type=checkbox name=debug $x>");
	row2("", "<input type=submit name=submit value=\"Update settings\">");
	end_table();
	echo "</form>";
}

function show_all() {
	admin_page_head("Bolt course administration");
	show_courses();
	echo "<p>
		<a href=bolt_admin.php?action=add_course_form>Add course</a>
		<p>
		<a href=bolt_admin.php?action=update_user_form>User settings</a>
	";
	admin_page_tail();
}

function clear_confirm() {
	global $course_id;

	admin_page_head("Bolt course administration");
	echo "This will clear all student data for this course.
		This is irrevocable.
		Are you sure you want to do this?
		<p>
		<a href=bolt_admin.php?action=clear&course_id=$course_id>Yes</a>
	";
	admin_page_tail();
}

function clear() {
	global $course_id;

	admin_page_head("Deleting course data");
	BoltEnrollment::delete_aux("course_id = $course_id");
	BoltView::delete_aux("course_id = $course_id");
	BoltResult::delete_aux("course_id = $course_id");
	BoltXsetResult::delete_aux("course_id = $course_id");
	BoltSelectFinished::delete_aux("course_id = $course_id");
	BoltRefreshRec::delete_aux("course_id = $course_id");
	BoltQuestion::delete_aux("course_id = $course_id");
	
	echo "
		Course data deleted.
	";
	admin_page_tail();
}

$user = get_logged_in_user();

$db = BoltDb::get();
if (!$db) error_page("Can't connect to database server");

if (!$db->table_exists('bolt_course')) {
	page_head("Create Bolt database");
	$db_name = $db->db_name;
	echo "
		The database tables for Bolt don't seem to exist.
		To create them, go to ~/boinc/db and type
		<pre>
mysql $db_name < bolt_schema.sql
</pre>
	Then <a href=bolt_admin.php>reload this page</a>.
	";
	page_tail();
	exit();
}

BoltUser::lookup($user);
$course_id = get_int('course_id', true);
if ($course_id) $course = BoltCourse::lookup_id($course_id);

$action = get_str('action', true);
switch ($action) {
case 'add_course_form':
	admin_page_head("Add course");
	add_course_form();
	admin_page_tail();
	break;
case 'add_course':
	$short_name = BoltDb::escape_string(get_str('short_name'));
	$name = BoltDb::escape_string(get_str('course_name'));
	$description = BoltDb::escape_string(get_str('description'));
	$now = time();
	BoltCourse::insert("(create_time, short_name, name, description) values ($now, '$short_name', '$name', '$description')");
	Header('Location: bolt_admin.php');
	break;
case 'update_user_form':
	admin_page_head("Bolt user settings");
	user_settings();
	admin_page_tail();
	break;
case 'update_user':
	$flags = 0;
	if (get_str('show_all', true)) $flags |= BOLT_FLAGS_SHOW_ALL;
	if (get_str('debug', true)) $flags |= BOLT_FLAGS_DEBUG;
	$user->bolt->update("flags=$flags");
	$user->bolt->flags = $flags;
	Header('Location: bolt_admin.php');
	break;
case 'hide':
	if (!$course) error_page("no such course");
	$course->update("hidden=1");
	Header('Location: bolt_admin.php');
	break;
case 'unhide':
	if (!$course) error_page("no such course");
	$course->update("hidden=0");
	Header('Location: bolt_admin.php');
	break;
case 'clear_confirm':
	clear_confirm();
	break;
case 'clear':
	clear();
	break;
case '':
	show_all();
	break;
default:
	error_page("unknown action $action");
}


?>
